- super('worker-thread-pool:pioardi')
-
- this.maxInactiveTime = this.opts.maxInactiveTime ?? 1000 * 60
- this.async = !!this.opts.async
- this.lastTask = Date.now()
- if (!fn) throw new Error('Fn parameter is mandatory')
- // keep the worker active
- if (!isMainThread) {
- this.interval = setInterval(
- this.checkAlive.bind(this),
- this.maxInactiveTime / 2
- )
- this.checkAlive.bind(this)()
- }
- parentPort?.on('message', (value: MessageValue<Data>) => {
- if (value?.data && value.id) {
- // here you will receive messages
- // console.log('This is the main thread ' + isMainThread)
- if (this.async) {
- this.runInAsyncScope(this.runAsync.bind(this), this, fn, value)
- } else {
- this.runInAsyncScope(this.run.bind(this), this, fn, value)
- }
- } else if (value.parent) {
- // save the port to communicate with the main thread
- // this will be received once
- this.parent = value.parent
- } else if (value.kill) {
- // here is time to kill this thread, just clearing the interval
- if (this.interval) clearInterval(this.interval)
- this.emitDestroy()
- }
- })
- }
-
- protected checkAlive (): void {
- if (Date.now() - this.lastTask > this.maxInactiveTime) {
- this.parent?.postMessage({ kill: 1 })
- }
- }
-
- protected run (
- fn: (data?: Data) => Response,
- value: MessageValue<Data>
- ): void {
- try {
- const res = fn(value.data)
- this.parent?.postMessage({ data: res, id: value.id })
- this.lastTask = Date.now()
- } catch (e) {
- this.parent?.postMessage({ error: e, id: value.id })
- this.lastTask = Date.now()
- }